Hi,

= 3,141,073,800  Yes!  or 3,141,073,800/(3963)^2 ~ 200

 w when r = 1,388   

  = 1630.4189    Note:  w will be more as r is less

   Estimating Answer:   ~ 3x10^9/2x10^6 = 1.5x10^3 = 1500

Re: TY  Note: 1500 was just an approxiamation, which is something recommended

when dealing with large numbers...to get a 'ballpark' fiqure to compare with.

1630.4189 is the Actual weight.  Round as directed.  rounded to the nearest whole number would be 1630.

Yes, the idea is 'weightlessness' is something reserved for being  a very... long ways above the earth's surface.  

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